The Associated Press reports that Actor Marlon Brando has passed away at age 80. The death occurred at an undisclosed Los Angeles hospital Thursday, attorney David J. Seeley said Friday. The cause of death was being withheld, Seeley said, noting the actor “was a very private man.”

Brando revolutionized American acting with his Method performances in A Streetcar Named Desire and On the Waterfront and went on to create the iconic character of Don Vito Corleone in The Godfather.

Brando, whose unpredictable behavior made him equally fascinating off the screen, was acclaimed the greatest actor of his generation, a two-time winner of the Academy Award who influenced some of the best actors of the generation that followed, among them Al Pacino, Robert De Niro and Jack Nicholson.

Brando will forever be known to comic book fans as Jor-EL in Superman.